[UPDATE -- 4 P.M. SUNDAY, JANUARY 16] Keeanga-Yamahtta Taylor, a professor of African American Studies at Princeton University who is among 2021 MacArthur “genius grant” winners, delivered the keynote address for Duke University’s annual Martin Luther King Jr. commemoration Sunday. The threat of hazardous conditions Sunday from freezing rain forced the observance to move online. The commemoration can be viewed here.